US3874382A - Sealing piston cap for hypodermic injection syringe - Google Patents

Sealing piston cap for hypodermic injection syringe Download PDF

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Publication number
US3874382A
US3874382A US347325A US34732573A US3874382A US 3874382 A US3874382 A US 3874382A US 347325 A US347325 A US 347325A US 34732573 A US34732573 A US 34732573A US 3874382 A US3874382 A US 3874382A
Authority
US
United States
Prior art keywords
piston
skirt
syringe
cap
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US347325A
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English (en)
Inventor
Louis Nogier
Paul Nogier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR7212553A priority Critical patent/FR2178826B1/fr
Priority to DE19732314949 priority patent/DE2314949A1/de
Priority to NL7304348A priority patent/NL7304348A/xx
Priority to BE129424A priority patent/BE797514A/xx
Priority to GB1545973A priority patent/GB1414819A/en
Application filed by Individual filed Critical Individual
Priority to IT12542/73A priority patent/IT992252B/it
Priority to US347325A priority patent/US3874382A/en
Application granted granted Critical
Publication of US3874382A publication Critical patent/US3874382A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
    • F16J1/006—Pistons; Trunk pistons; Plungers obtained by assembling several pieces of different materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip

Definitions

  • ABSTRACT relates to a sealing piston cap made of rubber for a hypodermic injection syringe, the piston cap making it possible to obtain automatic sealing during suction and compression.
  • the present invention relates to a new rubber sealing cap for the piston of a hypodermic injection syringe provided with self-sealing during suction and compression, having a simple shape easy to mold and being easily mountable on the head of a piston.
  • the last cap also offers positive advantages with respect to prior caps because of its convex shape and the absence of roughness in contact with the liquid to be injected which facilitates cleaning and sterilization.
  • the new cap object of the present invention, retains the advantages of the preceding caps but acquires the three qualities that lack in the latter and in the best of the caps described in French Pat. No. 1,288,146, that 1. a simple shape making the molding of the cap easy and thus allowing practically a total absence of scrapped parts during manufacture;
  • FIG. 1 is a cross-sectional view of the forward part of a hypodermic syringe of which the piston is provided with a cap as aforesaid,
  • FIG. 2 is a side elevational view, half in cross-section, illustrating the sealing cap alone.
  • the sealing cap comprises a skirt 1 closed at one end by a forward bottom wall 2 of which the outer face 3 in contact with the liquid is convex and without roughness.
  • the bottom wall 2 has an appreciable thickness that makes it possible to transmit the pressure of the liquid on the skirt 1 of the sealing cap.
  • the skirt 1 is provided with a single circular sealing ring 4 located near the opening 5 of the cap. Inwardly and in line with the ring 4 there is provided an annular hollow or groove 6 which thins the cap skirt 1.
  • the skirt 1 forwardly of the ring 4 and of the groove 6, the skirt 1 inwardly forms an annular bead 7 forwardly of which is provided a circular mounting or coupling channel 8 located immediately behind the forward wall 2.
  • the reduced diameter portion of the piston joins the. remaining cylindrical portion of larger diameter by a shoulder making a slight slope (10 to 15) that facilitates sealing of the cap when used under compression.
  • This sloping shoulder is designated, in FIG. 1, by the numeral 13.
  • the new cap as described offers self-sealing qualities during compression as well as during suction, that is its sealing feature automatically adapts itself to overpressure or underpressure to which it is subjected. This feature makes it possible to obtain a very smooth sliding displacement when the forces exerted on the liquid are 3 small; indeed, during that time the force of the sealing ring 4 on the wall of the cylinder is reduced to a minimum; it has voluntarily been made small at rest, but nevertheless sufficient to prevent the liquid from flowing out.
  • the pressure of the sealing ring 4 over the wall of the cylinder 10 automatically increases in proportion to the pressure of the liquid on the cap because of its very special shape. Indeed, under compression forces, the cap 1 bends upon itself at the level of the sealing ring by pushing the latter ring outwardly and this more so as the pressure increases; the slight inclined slope 13 of the piston over which the circular edge of the cap bears helps the cap skirt to rock outwardly and thus increases sealingability,
  • sealing cap being of generally cup shape, having an end wall extending across the end of said piston and a single skirt portion extending loosely between said piston and cylinder;
  • annular sealing ring extending circumferentially around said skirt in sliding engagement with said cylinder, said sealing ring being in the form of a thin-walled rib and defining and annular groove at the inner side of said skirt;

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Anesthesiology (AREA)
  • Vascular Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US347325A 1972-04-04 1973-04-02 Sealing piston cap for hypodermic injection syringe Expired - Lifetime US3874382A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7212553A FR2178826B1 (enrdf_load_stackoverflow) 1972-04-04 1972-04-04
DE19732314949 DE2314949A1 (de) 1972-04-04 1973-03-26 Neuartige kautschuckdichtung fuer injektionsspritze
NL7304348A NL7304348A (enrdf_load_stackoverflow) 1972-04-04 1973-03-28
BE129424A BE797514A (fr) 1972-04-04 1973-03-29 Nouveau joint d'etancheite en caoutchouc pour seringue a injection hypodermique
GB1545973A GB1414819A (en) 1972-04-04 1973-03-30 Syringes
IT12542/73A IT992252B (it) 1972-04-04 1973-04-02 Guarnizione di tenuta in gomma per siringhe per iniezione ipo dermica
US347325A US3874382A (en) 1972-04-04 1973-04-02 Sealing piston cap for hypodermic injection syringe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7212553A FR2178826B1 (enrdf_load_stackoverflow) 1972-04-04 1972-04-04
US347325A US3874382A (en) 1972-04-04 1973-04-02 Sealing piston cap for hypodermic injection syringe

Publications (1)

Publication Number Publication Date
US3874382A true US3874382A (en) 1975-04-01

Family

ID=42563058

Family Applications (1)

Application Number Title Priority Date Filing Date
US347325A Expired - Lifetime US3874382A (en) 1972-04-04 1973-04-02 Sealing piston cap for hypodermic injection syringe

Country Status (7)

Country Link
US (1) US3874382A (enrdf_load_stackoverflow)
BE (1) BE797514A (enrdf_load_stackoverflow)
DE (1) DE2314949A1 (enrdf_load_stackoverflow)
FR (1) FR2178826B1 (enrdf_load_stackoverflow)
GB (1) GB1414819A (enrdf_load_stackoverflow)
IT (1) IT992252B (enrdf_load_stackoverflow)
NL (1) NL7304348A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196909A (en) * 1977-08-05 1980-04-08 Ceskoslovenska Akademie Ved Piston and sealing head therefor
WO1982004387A1 (en) * 1981-06-01 1982-12-23 David H Malcolm Hemoseal blood collection device
US4601374A (en) * 1982-04-22 1986-07-22 Federal-Mogul Corporation Hydraulic clutch piston and seal
US4602689A (en) * 1980-03-19 1986-07-29 Robert Bosch Gmbh Power tool
US4620625A (en) * 1982-04-22 1986-11-04 Federal-Mogul Corporation Fluid actuated clutch assembly
US5413358A (en) * 1993-01-12 1995-05-09 A-Dec, Inc. Seal for push-button switches
US5735188A (en) * 1996-06-04 1998-04-07 Automotive Products (Usa), Inc. External slave cylinder for hydraulic clutch release system
WO2001097876A1 (en) * 2000-06-21 2001-12-27 Mckinley Medical, Lllp Multi-dose infusion pump providing minimal flow between doses
US20090047622A1 (en) * 2007-07-20 2009-02-19 Voco Gmbh Syringe and Method for Dosed Dispensing of Materials
WO2010081346A1 (zh) * 2008-12-30 2010-07-22 Lin Zuoqian 一种低残留安全自毁注射器
US20160220758A1 (en) * 2013-10-02 2016-08-04 Sumitomo Rubber Industries, Ltd. Gasket for pre-filled syringe
US9925338B2 (en) * 2008-11-26 2018-03-27 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
CN114523606A (zh) * 2022-04-24 2022-05-24 合肥精创科技有限公司 泥浆泵用高性能双硬度活塞及其制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223022A1 (de) * 2017-12-18 2019-06-19 Continental Automotive Gmbh Ventil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895773A (en) * 1956-10-22 1959-07-21 Robert K Mcconnaughey Variable diameter tensed ring piston
US3147753A (en) * 1961-02-08 1964-09-08 Nogier Louis Syringe piston

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895773A (en) * 1956-10-22 1959-07-21 Robert K Mcconnaughey Variable diameter tensed ring piston
US3147753A (en) * 1961-02-08 1964-09-08 Nogier Louis Syringe piston

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196909A (en) * 1977-08-05 1980-04-08 Ceskoslovenska Akademie Ved Piston and sealing head therefor
US4602689A (en) * 1980-03-19 1986-07-29 Robert Bosch Gmbh Power tool
WO1982004387A1 (en) * 1981-06-01 1982-12-23 David H Malcolm Hemoseal blood collection device
US4601374A (en) * 1982-04-22 1986-07-22 Federal-Mogul Corporation Hydraulic clutch piston and seal
US4620625A (en) * 1982-04-22 1986-11-04 Federal-Mogul Corporation Fluid actuated clutch assembly
US5413358A (en) * 1993-01-12 1995-05-09 A-Dec, Inc. Seal for push-button switches
US5735188A (en) * 1996-06-04 1998-04-07 Automotive Products (Usa), Inc. External slave cylinder for hydraulic clutch release system
US6348043B1 (en) * 1998-12-29 2002-02-19 Mckinley Medical, Lllp Multi-dose infusion pump providing minimal flow between doses
WO2001097876A1 (en) * 2000-06-21 2001-12-27 Mckinley Medical, Lllp Multi-dose infusion pump providing minimal flow between doses
US20090047622A1 (en) * 2007-07-20 2009-02-19 Voco Gmbh Syringe and Method for Dosed Dispensing of Materials
US20130065196A1 (en) * 2007-07-20 2013-03-14 Voco Gmbh Syringe and method for dosed dispensing of materials
US8641416B2 (en) * 2007-07-20 2014-02-04 VOCCO GmbH Syringe and method for dosed dispensing of materials
US9925338B2 (en) * 2008-11-26 2018-03-27 Acist Medical Systems, Inc. Apparatus and methods for fluid pressurizing units of injection systems
WO2010081346A1 (zh) * 2008-12-30 2010-07-22 Lin Zuoqian 一种低残留安全自毁注射器
US20160220758A1 (en) * 2013-10-02 2016-08-04 Sumitomo Rubber Industries, Ltd. Gasket for pre-filled syringe
US9981089B2 (en) * 2013-10-02 2018-05-29 Sumitomo Rubber Industries, Ltd. Gasket for pre-filled syringe
CN114523606A (zh) * 2022-04-24 2022-05-24 合肥精创科技有限公司 泥浆泵用高性能双硬度活塞及其制备方法

Also Published As

Publication number Publication date
GB1414819A (en) 1975-11-19
DE2314949A1 (de) 1973-10-18
NL7304348A (enrdf_load_stackoverflow) 1973-10-08
BE797514A (fr) 1973-07-16
FR2178826A1 (enrdf_load_stackoverflow) 1973-11-16
IT992252B (it) 1975-09-10
FR2178826B1 (enrdf_load_stackoverflow) 1977-04-01

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